Consolidated Condensed Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Net sales and revenue	$ 151,013	$ 81,163
Cost of sales	145,517	76,451
Gross profit	5,496	4,712
Selling, general and administrative expenses	(2,707)	(2,348)
Equity in income of unconsolidated ethanol affiliates	442	5,782
Interest income	49	171
Interest expense	(1,281)	(663)
(Losses) gains on derivative financial instruments, net	(147)	68
Income from continuing operations before income taxes	1,852	7,722
Provision for income taxes	(533)	(2,681)
Income from continuing operations	1,319	5,041
Income from discontinued operations, net of tax	183	390
(Loss) gain on disposal of discontinued operations, net of tax	(10)	125
Net income	1,492	5,556
Net income attributable to noncontrolling interests	(559)	(904)
Net income attributable to REX common shareholders	933	4,652
Weighted average shares outstanding - basic (in Shares)	8,360	9,432
Basic income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$ 0.09	$ 0.44
Basic income per share from discontinued operations attributable to REX common shareholders (in Dollars per share)	$ 0.02	$ 0.04
Basic income per share from disposal of discontinued operations attributable to REX common shareholders (in Dollars per share)		$ 0.01
Basic net income per share attributable to REX common shareholders (in Dollars per share)	$ 0.11	$ 0.49
Weighted average shares outstanding – diluted (in Shares)	8,439	9,560
Diluted income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$ 0.09	$ 0.44
Diluted income per share from discontinued operations attributable to REX common shareholders (in Dollars per share)	$ 0.02	$ 0.04
Diluted income per share from disposal of discontinued operations attributable to REX common shareholders (in Dollars per share)		$ 0.01
Diluted net income per share attributable to REX common shareholders (in Dollars per share)	$ 0.11	$ 0.49
Amounts attributable to REX common shareholders:
Income from continuing operations, net of tax	760	4,137
Income from discontinued operations, net of tax	173	515
Net income	$ 933	$ 4,652